Articles | Volume 18, issue 4
https://doi.org/10.1007/s00585-000-0411-5
© European Geosciences Union 2000
https://doi.org/10.1007/s00585-000-0411-5
© European Geosciences Union 2000
30 Apr 2000
30 Apr 2000
A case study of a radially polarized Pc4 event observed by the Equator-S satellite
R. Cramm
Institut für Geophysik und Meteorologie, Technische Universität, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
K. H. Glassmeier
Institut für Geophysik und Meteorologie, Technische Universität, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
C. Othmer
Institut für Geophysik und Meteorologie, Technische Universität, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
K. H. Fornacon
Institut für Geophysik und Meteorologie, Technische Universität, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
H. U. Auster
Institut für Geophysik und Meteorologie, Technische Universität, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
W. Baumjohann
Max-Planck-Institut für extraterrestrische Physik, PO Box 1603, D-85740 Garching, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
E. Georgescu
Institute of Space Sciences, Bucharest, Romania
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Max-Planck-Institut für extraterrestrische Physik, PO Box 1603, D-85740 Garching, Germany
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Correspondence to: C. Othmer
e-mail: c.othmer@tu-bs.de
Abstract. A 16 mHz Pc4 pulsation was recorded on March 17, 1998, in the prenoon sector of the Earth's magnetosphere by the Equator-S satellite. The event is strongly localized in radial direction at approximately L = 5 and exhibits properties of a field line resonance such as an ellipticity change as seen by applying the method of the analytical signal to the magnetic field data. The azimuthal wave number was estimated as m \approx 150. We discuss whether this event can be explained by the FLR mechanism and find out that the change in ellipticity is more a general feature of a localized Alfvén wave than indicative of a resonant process.
Key words: Magnetospheric physics (MHD waves and instabilities)
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How to cite. Cramm, R., Glassmeier, K. H., Othmer, C., Fornacon, K. H., Auster, H. U., Baumjohann, W., and Georgescu, E.: A case study of a radially polarized Pc4 event observed by the Equator-S satellite, Ann. Geophys., 18, 411–415, https://doi.org/10.1007/s00585-000-0411-5, 2000.